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    Relationship of phenotypic structures and allelochemical compounds of okra (Abelmoschus spp.) to resistance against Aphis gossypii Glover

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    S16ArtAbangRelationshipInthomDev.PDF (402.4Kb)
    Date
    2016
    Author
    Abang, A.F.
    Srinivasan, R.
    Kekeunou, S.
    Yeboah, M.
    Hanna, R.
    Lin, M.Y.
    Tenkouano, A.
    Bilong-Bilong, C.F.
    Type
    Journal Article
    Target Audience
    Scientists
    Metadata
    Show full item record
    Abstract/Description
    The cotton aphid (Aphis gossypii) is one of the major pests of okra. Eleven okra varieties collected from farmers’ fields in Cameroon and four aphid-resistant accessions from The World Vegetable Center (AVRDC, Asian Vegetable Research and Development Center) were evaluated from October 2012 to March 2013, and another seven aphid-resistant accessions from AVRDC were evaluated from March to July 2013 at AVRDC’s Nkolbisson station, Yaound e, Cameroon. Accessions selected from these trials were screened in an advanced confirmatory screening in autumn (October December) 2013 in Shanhua, Taiwan. Results showed that none of the farmers’ landraces were resistant to aphids. Two accessions (VI041210 and VI033824) with the lowest aphid populations had the highest trichome density. Analysis of various phytochemicals in selected okra accessions revealed that higher nitrogen and potassium levels made the okra accessions susceptible to aphids during the reproductive stage of the plants. Similarly, the total phenol content was lower in moderately resistant accessions during their reproductive stage. Aphid feeding induced an increase in phenols, and to a lesser extent, tannins. Accessions VI041210 and VI033824 could be incorporated into an integrated pest management strategy to enhance productivity of okra.
    https://dx.doi.org/10.1080/09670874.2015.1095372
    Multi standard citation
    Permanent link to this item
    https://hdl.handle.net/20.500.12478/1343
    Digital Object Identifier (DOI)
    https://dx.doi.org/10.1080/09670874.2015.1095372
    Research Themes
    PLANT PRODUCTION & HEALTH
    IITA Subjects
    Pests Of Plants; Plant Health
    Agrovoc Terms
    Resistance; Okra; Aphids; Allelochemicals; Abelmoschus
    Regions
    Africa; Central Africa; East Asia
    Countries
    Cameroon; Taiwan
    Journals
    International Journal of Pest Management
    Collections
    • Journal and Journal Articles4835
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